Driver for disk talking machines



R. L. HOLLIMAN AND J. W. COLLINS.

DRIVER FOR DISK TALKING MACHINES.

APPLICATION FILED JUNE 29,1921.

1 ,406,864. Patented Feb. 14, 1922.

l a 1517 M d W w 40 7 J (fl -60222723 100w v i UNITEDSTATES PATENT O FROBERT LEWIS HOLLIMAN AND JOHN woivrn COLLINS, or vALDosrn, emit DRIVERFOR 151s]: TALKING mcnmns.

\ the county of Lowndes and State of Georgia,

have invented certain new and useful Imrovements in Drivers for DiskTalking achines; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled "in the art to which it appertains to make and use thesame. 7 The present invention relates to improvements in drivers fordisk talking machines or the like, and has for an object to provide animproved driving device for the rotary table upon which the disk recordis received, which driving device is united with the actuating motor,one element of the driving device being combined as a unit with themotor and being movable therewith radially of a driving disk whereby tovary the speed ratio.

Another object of the invention resides in combining a motor andfriction gear in a compact, unitary arrangement assembled and mounted soas to be capable of a sliding movement with respect to the disk whichthe friction gear engages and drives.

A further object of the invention resides in combining andarranging theseveral parts of the apparatus so that the motor and friction geardriven and supported thereby will be contained within the cabinet of thephonograph and supported upon guides therein for sliding movement, whichsliding movement is effected by manipulating means extending upon theexterior of the cabinet and combined with a latch to hold the parts inthe adjusted position.

\Vith the foregoing and other objects in i view, the invention will bemore fully described hereinafter, and will be more particularly pointedout in the claims appended hereto.

In the drawings, wherein like symbols refer to like or correspondingparts throughout the several views,

Fig. 1 is a fragmentary vertical sectional view through a phonographcabinet showing the improved driving device;

Fig. 2 is a bottom plan view thereof with certain parts removedforclearness;

Fig. 3 is an end view of the motor support and guideways"; and

Fig. 4 is a top plan view thereof.

Specification of Letters Patent. Patented Application filed June 29,1921 Serial No. 481,437.

Febl14, 1922.

Referring more particularly to the drawlngs, 1 des gnates .a cabinet,being the customary cabinet of phonograph machines and provided witha'top v2, above which lies the rotary table 3 for receiving the diskrecords. In accordance with the usual practice, the

table 3 is supported and rotated by a verasses down through the top 2and 1s suitab y journaled tically disposed shaft 41 which therein.

According to the invention we provide a driving disk, 5 on the lower endof the shaft 4 housed within the cabinet 1 and lying preferably inspaced relation beneath the top 2; and with this'driving disk 5 isengaged a friction gear 6 fixedly mounted upon the projecting shaft 7 ofa motor 8, which, for convenience, is preferably an electric motor.Suitable leads are brou ht to the motor from a plug and socket or 0t ersource of electric current. The motor 'is supported with the frictiongear 6 for a sliding movement within the cabinet, to the end that suchfriction gear 6 may progress along a ra'dial'line with respect to thedriving disk 5 as becomes necessary in varying the speedof the rotarytable 3. The friction wheel 6 and the motor 8 thus form a combined unitwhich move together and are thus compactly assembled and made easilyshiftable, and at the same time the weight of the motor '8 addsstability to the friction gear 6 and the device dispenses with sucharrangements as keys to permitthe sliding of the friction gear 6 uponthe motor shaft.

The motor is, in this instance, supported by arms 9 and 10 which engagewith opposite sides thereof and are preferably four in number, two ofsuch arms being disposed at each side of the motor. The arms areprovided with flanges 11 and, 12 at their upper ends to be slidablyreceived in the downwardly offset portions of Z-shaped guides 13 and 14whichare boltedor other wise secured to the under surface of the top 17projecting through the horizontal wall of the cabinet and beingslida-ble therein. An operating knob or head 18 is providedon the outerend of the rod 17 and a spring rack 19 is provided beneath the rod 17;to be engaged with a tooth 20 on the exterior of vthe cabinet. I

In operation, the motor 8 turns the frictlon ear 6, and by reason ofthe-engagement of t e latter with the undersurface of the disk 5,the'latter is rotated at a proportional speed and drives the rotarytable 3 which carries the disk around beneath the needle of thephonograph.

It iswell known in this art that a nice adjustment of the speed isrequired in order to secure the proper reproduction as to pitch of thepiece, and also to accord with the tempo of the same, and heretoforesuch adjustment has been quite generally made by regulators upon thegovernors of spring motors which are usually employed to drive the mostpopular makes of phonographs. This is an inaccurate adjustment andadifiicult one to make at best. With the arrangement shown, a largerange of adjustment can be had and one that may be nicely effected bythe mere pushing in of the rod 17 or the withdrawing of it to a suitabledistance. In this way the friction ear 6 is made to progress nearer toor fiirther away from the center of the disc 5 and thus vary theproportion of speed at which the latter is driven. The guideconstruction affords an easy path of adjustment and the motor 8 adds itsweight to that of the friction gear and gives the construction astability that it would otherwise not have.

It is obvious that various changes and modifications may be made in thedetails of construction and design of the above specifically describedembodiment of this invention without departing from the spirit thereof,such changes and modifications being restricted only by the scope of thefollowing claims.

What is claimed is 1. In a phonograph, an enclosing cabinet, a rotatabletable arranged above the cabinet, an operating disk arranged within theenclosing cabinet and connected to said turn table, a guicieway arrangedin the enclosing engage the side of said disk, and a shifting member'slidably mounted throughthe wall of said enclosing cabinet andconnected to said carriage and projecting over thewall of said cabinetwhereby the shiftin member may be manually operated for sliding thecarriage with its motor and gear member relatively to the disk.

, 2. In a phonograph, a cabinet closed on its sides and top and housingtherewith-in a motor chamber, a turn table extending above the cabinetfor receiving a record, drive means in connection with the turn table,but lying within the motor chamber and entirely enclosed by saidcabinet, a motor movable in said motor chamber and entirely within thecabinet for varying the speed of the rotary table, a carriage forsupporting said motor, guide means within the upper portion of the motorchamber for slidably suspending said carriage, operating means directlyconnected with the carriage and extendmg through a side wall of thecabinet to the exterior thereof and adapted for sliding movement by thehand of the operator, and comperating parts on the casing and saidoperating means for securing the latter in an adjusted position.

3. In a phonograph, a cabinet, a rotary table for the disk record uponthe cabinet, a shaft for turning and supporting the table passingthrough the top of the cabinet, a driving disk on the shaft within thecabinet, a friction gear engaging the under surface of the disk, anelectric motor, having a shaft fixedly receiving said friction gear, apair of parallel guideways secured beneath the top of the cabinet. aframework for supporting the motor and gear slidable horizontally insaid guideways, an actuating rod extending from the framework throughthe wall of the cabinet, and means engaging the rod for holding themotor and gear in an adjusted position, substantially as described.

ROBERT LElVIS HOLLIMAN. JOHN WORTH COLLINS.

